Paternal Test (Y-DNA) Links

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Surname Projects - http://en.wikipedia.org/wiki/Surname_project
FTDNA Surname Projects - http://www.familytreedna.com/projects.aspx
WorldFamilies Surname Projects - http://www.worldfamilies.net/surnames_list

Y-Chromosome "Adam" - http://en.wikipedia.org/wiki/Y-chromosomal_Adam
Y-DNA Haplogroups - http://en.wikipedia.org/wiki/Human_Y-chromosome_DNA_haplogroups
European Y-DNA Halpogroup Distribution - http://www.eupedia.com/europe/european_y-dna_haplogroups.shtml
Y-DNA Haplogroup Maps - http://www.eupedia.com/europe/maps_Y-DNA_haplogroups.shtml

Most Common British Haplogroup (R1b) - http://en.wikipedia.org/wiki/R1b
2nd Most Common British Haplogroup (I) - http://en.wikipedia.org/wiki/Haplogroup_I1_%28Y-DNA%29
3rd Most Common British Haplogroup (R1a) - http://en.wikipedia.org/wiki/Haplogroup_R-M420_%28Y-DNA%29
4th Most Common British Haplogroup (J2) - http://en.wikipedia.org/wiki/Haplogroup_J-M172_%28Y-DNA%29

R1b Haplogroup Project - http://www.familytreedna.com/public/r1b/
I1 Haplogroup Project - http://www.familytreedna.com/public/yDNA_I1
R1a Haplogroup Project - http://www.familytreedna.com/public/R1aY-Haplogroup/
J2 Haplogroup Project - http://www.familytreedna.com/public/J2%20Y%20DNA%20group

International Society of Genetic Genealogy (ISOGG) - http://www.isogg.org/
ISOGG Haplogroup Tree - http://www.isogg.org/tree/
R Haplogroup Tree - http://www.isogg.org/tree/ISOGG_HapgrpR.html
I Haplogroup Tree - http://www.isogg.org/tree/ISOGG_HapgrpI.html
J Haplogroup Tree - http://www.isogg.org/tree/ISOGG_HapgrpJ.html

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Y-DNA SNP Name Cross Reference - http://www.isogg.org/tree/ISOGG_YDNA_SNP_Index.html